NHRA sportsman rules allow no more than 6" of rubber fuel line totall for the vehicle , theres a reason for this , personally I would use aluminum fuel lines in 3/8 or 1/2 morroso makes them and replumb the whole boat.
If i get some free time tonight at work, ill play with it and post it for everyone to see.
Time to man up and yank it John! Ray
Even in my rail and boat never take the chanceSent from my iPhone using SoCalJetBoats mobile app